肾绞痛时常用的解痉药有()。
A.M型胆碱能受体阻滞药
B.钙通道阻滞药
C.β-肾上腺素受体阻滞药
D.α-肾上腺素受体阻滞药
E.黄体酮
参考答案:A, B, D, E
----_____has been designed to enable children and young people to act safely on roads?
----Programmes and resources in the theme “Road Safety”.
A.Why is it that
B.What is it that
C.What is that
D.Is it what
图为女性生殖系统的一部分,请根据该图回答有关问题:
(1)[______]______能够产生卵细胞并分泌雌性激素,形成受精卵的部位是[______]______;
(2)胚胎发育初期所需的营养来自______,胚胎发育过程中,营养物质是通过胎盘和______从______获得,能形成胎盘的结构是[______]______;
(3)胎儿发育成熟后,是从[______]______产出,该过程叫做______.